Cottqn-qin



J. R. GRAY,

Gtton Grin.

\ Mmmm Feb. 22, ism.

ATTORNEYS UNITED STATES PATENT OFFICE.

lJAMES It. GRAY, OF GHESTERVILLE, MISSISSIPPI.

cotronuein.

SPECIFICATION A forming part of Letters Patent No.`238,109, dated. February 22., 1881.

Y Application 'tiled August 23, 1878.

To all lwhom it may concern:

Be 4it known that I, JAMES R. GRAY, of Ghesterville, in the county of Pontotoc, and in the State 0f Mississippi, have invented certain new and useful Improvements in Cotton- Gins5`and I do'hereby declare that the following is a full, clear, and exact 'description thereof, reference being had to the accompanying drawingsand to the letters of refer ence marked thereon, making a part of this speciiicat-ion.

My invention relates to ribs 'for cotton-girls andit consists in providing each rib with an inclined notch or slot on.` each side, as will be hereinafter more fully set forth.

vln order to enable others skill-ed inthe art to which niyinvention appertains to make and use the same,'I will now proceed to describe its construction and operation, referring to the annexed drawings, in which- Figure l is a plan View of a set of cottongin ribs embodying myinvention. Fig. 2 is a longitudinal section of the same.

AA 4represent a series of ribs for cottongins, said ribs being made in any desired form. Each rib A has on each side an inclinediiotch or slot, a, at the point where the saws draw the cotton down between the ribs.

Itis well known that the ribs cut the staple of cotton,the tooth gathering more cotton than it can force between the ribs, and the cotton is necessarily cut or torn from the tooth. It is not the saw-tooth, but the rib, that cuts the staple of cotton. To obviate this diiiiculty I provide the ribs with the inclined notches or slots c a, which allow the cottont/o pass through on each side of the tooth, giving it more room to make its escape to the-brush-wheel, having nothing in the way Vto cut' or tear the staple, which gives the full length of the staple, thus 4o increasing the value of the cotton.

I deem the incline ofthe slots important, as they allow a plane of action corresponding to the bevel of the teeth and the arc described by the peripheryv of the saw. 4 5

l am aware that a cotton-gin rib has been provided with a plate inserted therein, and a straight slot made in said plate, and I do not claim such as my invention. In my rib`the slots a are cutl ou an angle or sl-ope ot the' 5o toothof the saw, which draws the lint through the slot on a direct line with the tooth of the saw. It the slots were not so inclined, but straight, the lint would hang` on the upper edges of the slots and ll them up, so that the gin could not roll the cotton.

Having thus fully described my invention, what I claim as new, and desire to secureby Letters Patent, is-f- A cotton-gin rib provided on each side. with 6o a slot inclined so as to correspond with the are ot' a circle described by the l periphery of the saw, as and for the purposes herein set claim theforegoing I hand this 4th day of In testimony .that I have hereunto set my February, 1878.

JAMES It. GRAY.

Witnesses:

J. J. MCGARTHY, JAS. G. Dezina. 

